/*

SELECT COUNT(*)

AS "Total cross-namespace redirects from user to mainspace"

FROM redirect r

INNER JOIN page p ON p.page_id = r.rd_from

WHERE r.rd_namespace = 0

AND   p.page_namespace = 2;

​

SELECT COUNT(*)

AS "Cross-namespace redirects from user subpages to mainspace"

FROM redirect r

INNER JOIN page p ON p.page_id = r.rd_from

WHERE r.rd_namespace = 0

AND   p.page_title LIKE '%/%'

AND   p.page_namespace = 2;

​

SELECT concat( "[https://en.wikipedia.org/w/index.php?title=User:{{urlencode:",

              p.page_title, "}}&redirect=no User:", p.page_title, "] redirects to [[", r.rd_title, "]]" )

AS "Redirects from user, except user subpages, to mainspace"

FROM redirect r

INNER JOIN page p ON p.page_id = r.rd_from

WHERE p.page_namespace = 2

AND   r.rd_namespace = 0

AND   p.page_title NOT LIKE '%/%'

ORDER by page_title;

*/

​

SELECT concat( "[https://en.wikipedia.org/w/index.php?title=User:{{urlencode:",

              p.page_title, "}}&redirect=no User:", p.page_title, "]" )

AS "Userpages of nonexistent users"

FROM page p

LEFT JOIN `user`u ON u.user_name = REPLACE(SUBSTRING_INDEX(p.page_title, '/', 1), '_', ' ')

WHERE IS NULL(u.user_name)

ORDER by page_title;

​

/*I

SELECT concat( "[https://en.wikipedia.org/w/index.php?title=User:{{urlencode:",

              p.page_title, "}}&redirect=no User:", p.page_title, "] redirects to [[", r.rd_title, "]]" )

AS "Redirects from user subpages to mainspace"

FROM redirect r

INNER JOIN page p ON p.page_id = r.rd_from

WHERE p.page_namespace = 2

AND   r.rd_namespace = 0

AND   p.page_title LIKE '%/%'

ORDER by page_title

LIMIT 2000;

*/